From wayward mice and hissing snakes to acid-firing termites and poison quill-throwing tarantulas, Walt Disney World's recent three-dimensional film attractions have been groundbreaking and entertaining but maybe a little intense for younger guests. So when Imagineers set out to replace "Legend of the Lion King" at the Magic Kingdom, they were thinking kinder and gentler 3-D.

The result is "Mickey's PhilharMagic," a new 10-minute special effects-laden film starring classic Disney characters. (Who could be kinder and gentler?) When the animated attraction debuts next fall, it will star Donald Duck, Mickey Mouse, and other favorites in glorious, in-your-face, computer-generated three dimensions.

In the film, Donald starts out thinking he can conduct the PhilharMagic Orchestra and ends up darting in and out of scenes from various Disney animated features. The peripatetic duck goes under the sea with Ariel, soars through new worlds with Jasmine and Aladdin, just wants to be king alongside Simba, and joins the "Be Our Guest" scene from "Beauty and the Beast."

The show unfolds on a 150-foot-wide canvas (at press time, it is the world's largest 3-D projection surface) and is full of in-theater sounds, smells, and other effects that put you in the middle of the action with the perpetually hot-tempered Donald. Which, come to think of it, might just be scarier than the snakes, spiders, and rodents found in the other Disney 3-D adventures.